(PHP 5, PHP 7)
debug_print_backtrace — Prints a backtrace
$options = 0
[, int $limit = 0
]] )debug_print_backtrace() prints a PHP backtrace. It prints the function calls, included/required files and eval()ed stuff.
optionsAs of 5.3.6, this parameter is a bitmask for the following options:
| DEBUG_BACKTRACE_IGNORE_ARGS | Whether or not to omit the "args" index, and thus all the function/method arguments, to save memory. |
limit
As of 5.4.0, this parameter can be used to limit the number of stack frames printed.
By default (limit=0) it prints all stack frames.
No value is returned.
| Version | Description |
|---|---|
| 5.4.0 |
Added the optional parameter limit.
|
| 5.3.6 |
Added the optional parameter options.
|
Example #1 debug_print_backtrace() example
<?php
// include.php file
function a() {
b();
}
function b() {
c();
}
function c(){
debug_print_backtrace();
}
a();
?>
<?php
// test.php file
// this is the file you should run
include 'include.php';
?>
The above example will output something similar to:
#0 c() called at [/tmp/include.php:10] #1 b() called at [/tmp/include.php:6] #2 a() called at [/tmp/include.php:17] #3 include(/tmp/include.php) called at [/tmp/test.php:3]